Reasons for the cause of the explosion accident of storage energy stations Suggests on battery data online monitoring

Forfatter: Iflowpower – Leverandør av bærbar kraftstasjon

On April 16, 2021, an explosive fire accident occurred in Fengtai District, Beijing Fengtai District, causing 2 firefighters to sacrifice, 1 firefighter injured, 1 employee of the power station, the cause of the accident is still in the investigation. Many people will have questions, why will the energy storage power station exploded? Lithium-ion batteries will be self-igniting is a well-known thing. Why do happening an explosion of death?.

In this regard, the industry related experts said that the energy storage power station does have the likelihood of explosion. The storage capacity is a bulk energy storage battery. At present, the energy storage battery is multi-lithium-ion battery, its price / performance ratio is more advantageous than other batteries.

However, lithium-ion batteries can easily occur internally short-circuition, resulting in spontaneous combustion. A battery is composed of a positive electrode and a negative electrode, and the inside of the battery through the diaphragm to the positive and negative electrode, the electrolyte acts as a conduction purpose of lithium ions. If the diaphragm is damaged, it will continue to heat up.

It will continue to exotherm. The heat accumulation will exacerbate all the structures to break down the inside of the battery. Finally lead to spontaneous combustion, one battery self-ignition will heat to the peripheral battery, one pass Ten, ten pass hundred.

The electrolyte itself is a flammable solvent, which is extremely easy to combust, which is why the lithium-ion battery will grow rapidly after the fire, and the battery decomposition has flammable gas and oxygen, which will also aggressive. The causes of short circuits in the battery are roughly such a few: 1. With the aging of the battery, the battery negative (lithium) is dendrimer and constantly grow, puncture the diaphragm.

2. There is a problem of production quality in diaphragm. The factory is defective, dust or positive burrs in the production process, will cause internal short circuits.

3. Use the process battery temperature, which causes the diaphragm to decompose melting. 4.

Other external factors, transportation vibration, collision, puncture, etc. The explosion of the storage station should be a combustible gas after the battery is self -ustrabust. The gas accumulation cannot be released within the energy storage container.

After the concentration reaches the explosive limit, the entire container exploded, such power can lead to personal casualties. Simply, the lithium-ion battery is an electrical product, and there will be a short circuit. There is a lot of flammable products in the lithium-ion battery, and the fire is very violent, and combustible gas.

The energy storage container is a sealed box. A large number of lithium-ion batteries are stored in this box. After the battery spontaneous combustion, the flammable gas in the box may explode throughout the box, and they have the same Mars with the empty oil tank.

At present, there are also relevant standards for energy storage and fire safety in the industry "GB / T50148-2014 Chemical energy storage power station design specifications", important content is also the electrical safety, fire protection and other content of the energy storage power station. Fire safety monitoring is still the traditional fire smoke alarm, the temperature alarm is mainly, belongs to the accident alarm. The battery short circuit can be pre-warned in advance by battery voltage, temperature and other indicators, timely stop loss, or early warning to solve the pre-short-term micro-fault that causes internal short circuits, and prevents the purpose of preventing "burning".

It is recommended that the energy storage power station does online monitoring, prevent accidents, and reduce the tragedy of Fengtai storage station.